A crossover would be great but I don't know how they'd be able to do it as the gradient for the sensors on the track wouldn't match up.

Maybe on the approach on either side it faded to the grey of centre track for the whole width that way through the crossover would all just be that same grey, it would mean that you'd get no steering assistance through the section but that could actually be a positive. As long as you were lined up on the approach you'd be fine but any bumps would knock you way off.... .